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Noxious Weeds

Program Contact: Jason Ontjes, Noxious Weed Program Coordinator
(360) 376-3499 •

Got Tansy? Watch the video below to learn how, and why it’s important to control Tansy Ragwort in San Juan County.

Read the 2020 Annual Report!

SJCNWCB FINAL 2020 Annual Report 


Our Mission

The mission of the San Juan County Noxious Weed Program is to focus on education, prevention, technical assistance and control of noxious weeds through voluntary compliance with RCW 17.10 and WAC 16-750. The Program offers:

  • Early Detection and Rapid Response;
  • Educational Materials & Programs;
  • Noxious Weed Identification and Inventories;
  • Site-specific Control Recommendations;
  • Weed Control Assistance to Individuals, Organizations & Agencies;
  • Weed Wrench Loans to San Juan County Residents.

Our Goals

The Goals of the Noxious Weed Board Are:

  • To provide education and outreach services to public and private entities on topics related to invasive plants.
  • To provide education-based enforcement and implementation of state and county noxious weed laws.
  • To work closely with individuals, property owners, businesses, associations and government agencies in noxious weed control efforts.
  • To eradicate all known Class A noxious weeds within the county.
  • To Contain or control the spread of all state-designated or county-selected Class B and C noxious weeds within the county.
  • To prevent the incursion of newly listed or unlisted weeds of concern on to county lands.

Introduction to Noxious Weeds in San Juan County

What’s Happening


Brochures and other literature are available online or through the Weed Control Program at 376-3499.

Related Organizations

Try a Weed Wrench™

to eliminate Scotch Broom!


Need weed wrench instructions or info?

Weed wrenches may be checked out FOR FREE from the following sources:

Orcas – SJC Noxious Weed Board office in Eastsound (8 wrenches) (360) 376-3499

San Juan -WSU Extension-(2 wrenches) (360) 378-4414; SJC Public Works (360) 370-0500; SJC Land Bank (4 wrenches) (360) 378-4402

Lopez– Public Works Office (2 wrenches) (360) 370-0500

Lopez Land Bank -Amanda Wedow


Purchase a Wrench at:

Uprooter (888) 801-0201
or (541) 226-9872
Grants Pass, OR 97528

Poison Hemlock

Poison Hemlock information


How to identify Poison Hemlock vs. other plants. 


Noxious Weed Pamphlets

Information on identification, eradication or control (requires Adobe Acrobat Reader)

Guy wrapped in a weed

San Juan County Extension

221 Weber Way
Friday Harbor, WA 98250

Please contact us if you have any questions or concerns. Thank you!

Orcas Island, Jason Ontjes, NW Program Coordinator- (360)376-3499 or

Friday Harbor, Amber Michele Smith, NW Field Specialist- (360)338-5017 or